| Titre : |
The study of enhancing durability of thermochromic coatings by novel light stabilisers |
| Type de document : |
texte imprimé |
| Auteurs : |
Chieh-Hsiu Hsieh, Auteur ; Pei-Yun Lee, Auteur |
| Année de publication : |
2020 |
| Article en page(s) : |
p. 16-19 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Absorbeurs de rayonnement ultraviolet
Analyse de varianceEn statistique, l'analyse de la variance (terme souvent abrégé par le terme anglais ANOVA : ANalysis Of VAriance) est un ensemble de modèles statistiques utilisés pour vérifier si les moyennes des groupes proviennent d'une même population. Les groupes correspondent aux modalités d'une variable qualitative (p. ex. variable : traitement; modalités : programme d'entrainement sportif, suppléments alimentaires ; placebo) et les moyennes sont calculés à partir d'une variable continue (p. ex. gain musculaire).
Ce test s'applique lorsque l'on mesure une ou plusieurs variables explicatives catégorielles (appelées alors facteurs de variabilité, leurs différentes modalités étant parfois appelées "niveaux") qui ont de l'influence sur la loi d'une variable continue à expliquer. On parle d'analyse à un facteur lorsque l'analyse porte sur un modèle décrit par un seul facteur de variabilité, d'analyse à deux facteurs ou d'analyse multifactorielle sinon. (Wikipedia)
Décoloration
Essais accélérés (technologie)
Plan d'expérience
Résistance aux conditions climatiques
Revêtements organiques
Stabilisants à la lumière
Thermochromie
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
Thermochromic coatings are special effect coatings that change colour when the temperature changes. The colour changing function contributes to its most important benefit: bringing additional functions to routine items, such as a temperature indicating feature, food quality indicator, or authenticity verification. However, thermochromic coatings are usually sensitive to UV light or in-room light exposure. UV light would damage the thermochromic compounds and ruin the colour changing ability and hence, limit its application range. To expand the application of thermochromic coatings, solving the UV-sensitive issue is necessary. The purpose of this study was to find suitable solutions to solve the fading problems of thermochromic coatings.
Design of Experiment (DOE) method and statistical software were used to analyse the correlation of light stabiliser dosage and dry film thickness (DFT) after the QUV¬accelerated weathering test. According to the calculated results, the influence level of a novel light stabiliser (NLS) on colour difference value is 69%, while the influence level of DFT is 20%. Furthermore, we tested the protective effect of different dosages of NLS on the colour changing ability for thermochromic coatings after 72hr QUV exposure. According to our results, 3% and 5% of NLS both provide excellent protection and help the thermochromic coating to maintain its colour changing function after UV light exposure. / mAT |
| Note de contenu : |
- EXPERIMENT : Materials - Equipment - Methods - QUV accelerated weathering test - High temperature optical data test method
- RESULTS AND DISCUSSION : part I : Analyse the influence of light stabiliser and film thickness on the anti-discolouration protection of thermochromic coatings and establish the prediction model - Part II : Analyse the colour changing function of the thermochromic coating after QUV exposure
- Table 1 : The colour difference values(AE) with different NLS dosage and different DFT after QUV accelerated weathering tester for 72hr
- Table 2 : ANOVA table of NLS and DFT
- Table 3 : Parameter estimation table
- Table 4 : The colour difference values of the tested panel moving from room temperature into high temperature and the thermochromic ability retention rate
- Fig. 1 : The Linear relationship between the measured value and the predicted value showed that the model had good explanatory with the R Square Adj value as high as 0.897
- Fig. 2 : The Goodness-of-Fit test showed the experimental data was a normal distribution. Note: Ho = The data is from the Normal distribution. Small p-values reject Ho
- Fig. 3 : The appearance of samples for thermochromic coatings with different dosages of NLS and DFT after QUV accelerated weathering test for 72hr
- Fig. 4 : The contour maps of NLS, DFT, and AE were plotted. The white area shows the condition of predicted AE values lower than 10 |
| En ligne : |
https://drive.google.com/file/d/1zj695g8TY9NuGaLvS7nPxWq_6cEtxaTI/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34030 |
in POLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 210, N° 4660 (04/2020) . - p. 16-19
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The study of enhancing durability of thermochromic coatings by novel light stabilisers in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 210, N° 4660 (04/2020)
